ios: clang fixes for xcode 7.1. performance improvements on clang generation
Merge pull request #380 from jhaynie/master

ios: clang fixes for xcode 7.1.
[#379] Update to latest ios-sim to support Xcode 5.1.
Merge remote-tracking branch 'appcelerator/master'
Merge pull request #381 from matt-langston/master

[#379] Update to latest ios-sim to support Xcode 5.1